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Message-Id: <0ae7b982b4c87940a01d78200295f7bc66cb67f7.1656935522.git.viresh.kumar@linaro.org>
Date: Mon, 4 Jul 2022 17:37:50 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
Stephen Boyd <sboyd@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
Vincent Guittot <vincent.guittot@...aro.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH V3 12/20] OPP: Migrate set-clk-name API to use set-config helpers
Now that we have a central API to handle all OPP table configurations,
migrate the set-clk-name family of helpers to use the new
infrastructure.
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/opp/core.c | 142 +++++++++++++----------------------------
include/linux/pm_opp.h | 41 +++++++-----
2 files changed, 69 insertions(+), 114 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 8dbdfff38973..0a82ca7ae453 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2164,104 +2164,71 @@ static void _opp_put_regulators(struct opp_table *opp_table)
}
/**
- * dev_pm_opp_set_clkname() - Set clk name for the device
- * @dev: Device for which clk name is being set.
- * @name: Clk name.
- *
- * In order to support OPP switching, OPP layer needs to get pointer to the
- * clock for the device. Simple cases work fine without using this routine (i.e.
- * by passing connection-id as NULL), but for a device with multiple clocks
- * available, the OPP core needs to know the exact name of the clk to use.
+ * _opp_set_clknames() - Set clk names for the device
+ * @dev: Device for which clk names is being set.
+ * @names: Clk names.
+ *
+ * In order to support OPP switching, OPP layer needs to get pointers to the
+ * clocks for the device. Simple cases work fine without using this routine
+ * (i.e. by passing connection-id as NULL), but for a device with multiple
+ * clocks available, the OPP core needs to know the exact names of the clks to
+ * use.
*
* This must be called before any OPPs are initialized for the device.
*/
-struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
+static int _opp_set_clknames(struct opp_table *opp_table, struct device *dev,
+ const char * const names[])
{
- struct opp_table *opp_table;
- int ret;
+ const char * const *temp = names;
+ int count = 0;
- opp_table = _add_opp_table(dev, false);
- if (IS_ERR(opp_table))
- return opp_table;
+ /* Count number of clks */
+ while (*temp++)
+ count++;
- /* This should be called before OPPs are initialized */
- if (WARN_ON(!list_empty(&opp_table->opp_list))) {
- ret = -EBUSY;
- goto err;
- }
+ /*
+ * This is a special case where we have a single clock, whose connection
+ * id name is NULL, i.e. first two entries are NULL in the array.
+ */
+ if (!count && !names[1])
+ count = 1;
+
+ /* We support only one clock name for now */
+ if (count != 1)
+ return -EINVAL;
/* Another CPU that shares the OPP table has set the clkname ? */
if (opp_table->clk_configured)
- return opp_table;
+ return 0;
/* clk shouldn't be initialized at this point */
- if (WARN_ON(opp_table->clk)) {
- ret = -EBUSY;
- goto err;
- }
+ if (WARN_ON(opp_table->clk))
+ return -EBUSY;
/* Find clk for the device */
- opp_table->clk = clk_get(dev, name);
+ opp_table->clk = clk_get(dev, names[0]);
if (IS_ERR(opp_table->clk)) {
- ret = dev_err_probe(dev, PTR_ERR(opp_table->clk),
+ return dev_err_probe(dev, PTR_ERR(opp_table->clk),
"%s: Couldn't find clock\n", __func__);
- goto err;
}
opp_table->clk_configured = true;
- return opp_table;
-
-err:
- dev_pm_opp_put_opp_table(opp_table);
-
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname);
-
-/**
- * dev_pm_opp_put_clkname() - Releases resources blocked for clk.
- * @opp_table: OPP table returned from dev_pm_opp_set_clkname().
- */
-void dev_pm_opp_put_clkname(struct opp_table *opp_table)
-{
- if (unlikely(!opp_table))
- return;
-
- clk_put(opp_table->clk);
- opp_table->clk = ERR_PTR(-EINVAL);
- opp_table->clk_configured = false;
-
- dev_pm_opp_put_opp_table(opp_table);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname);
-
-static void devm_pm_opp_clkname_release(void *data)
-{
- dev_pm_opp_put_clkname(data);
+ return 0;
}
/**
- * devm_pm_opp_set_clkname() - Set clk name for the device
- * @dev: Device for which clk name is being set.
- * @name: Clk name.
- *
- * This is a resource-managed variant of dev_pm_opp_set_clkname().
- *
- * Return: 0 on success and errorno otherwise.
+ * _opp_put_clknames() - Releases resources blocked for clks.
+ * @opp_table: OPP table returned from _opp_set_clknames().
*/
-int devm_pm_opp_set_clkname(struct device *dev, const char *name)
+static void _opp_put_clknames(struct opp_table *opp_table)
{
- struct opp_table *opp_table;
-
- opp_table = dev_pm_opp_set_clkname(dev, name);
- if (IS_ERR(opp_table))
- return PTR_ERR(opp_table);
-
- return devm_add_action_or_reset(dev, devm_pm_opp_clkname_release,
- opp_table);
+ if (opp_table->clk_configured) {
+ clk_put(opp_table->clk);
+ opp_table->clk = ERR_PTR(-EINVAL);
+ opp_table->clk_configured = false;
+ }
}
-EXPORT_SYMBOL_GPL(devm_pm_opp_set_clkname);
/**
* dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper
@@ -2544,7 +2511,7 @@ static void _opp_clear_config(struct opp_config_data *data)
if (data->flags & OPP_CONFIG_PROP_NAME)
dev_pm_opp_put_prop_name(data->opp_table);
if (data->flags & OPP_CONFIG_CLK)
- dev_pm_opp_put_clkname(data->opp_table);
+ _opp_put_clknames(data->opp_table);
dev_pm_opp_put_opp_table(data->opp_table);
kfree(data);
@@ -2595,32 +2562,9 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
/* Configure clocks */
if (config->clk_names) {
- const char * const *temp = config->clk_names;
- int count = 0;
-
- /* Count number of clks */
- while (*temp++)
- count++;
-
- /*
- * This is a special case where we have a single clock, whose
- * connection id name is NULL, i.e. first two entries are NULL
- * in the array.
- */
- if (!count && !config->clk_names[1])
- count = 1;
-
- /* We support only one clock name for now */
- if (count != 1) {
- ret = -EINVAL;
- goto err;
- }
-
- err = dev_pm_opp_set_clkname(dev, config->clk_names[0]);
- if (IS_ERR(err)) {
- ret = PTR_ERR(err);
+ ret = _opp_set_clknames(opp_table, dev, config->clk_names);
+ if (ret)
goto err;
- }
data->flags |= OPP_CONFIG_CLK;
}
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 94d0101c254c..ed1906bbe8bb 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -186,9 +186,6 @@ void dev_pm_opp_clear_config(int token);
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
-struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
-void dev_pm_opp_put_clkname(struct opp_table *opp_table);
-int devm_pm_opp_set_clkname(struct device *dev, const char *name);
struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
int devm_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
@@ -387,18 +384,6 @@ static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, con
static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
-static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
-{
- return ERR_PTR(-EOPNOTSUPP);
-}
-
-static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {}
-
-static inline int devm_pm_opp_set_clkname(struct device *dev, const char *name)
-{
- return -EOPNOTSUPP;
-}
-
static inline struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char * const *names, struct device ***virt_devs)
{
return ERR_PTR(-EOPNOTSUPP);
@@ -629,4 +614,30 @@ static inline int devm_pm_opp_set_supported_hw(struct device *dev,
return devm_pm_opp_set_config(dev, &config);
}
+/* clkname helpers */
+static inline int dev_pm_opp_set_clkname(struct device *dev, const char *name)
+{
+ const char *names[] = { name, NULL };
+ struct dev_pm_opp_config config = {
+ .clk_names = names,
+ };
+
+ return dev_pm_opp_set_config(dev, &config);
+}
+
+static inline void dev_pm_opp_put_clkname(int token)
+{
+ dev_pm_opp_clear_config(token);
+}
+
+static inline int devm_pm_opp_set_clkname(struct device *dev, const char *name)
+{
+ const char *names[] = { name, NULL };
+ struct dev_pm_opp_config config = {
+ .clk_names = names,
+ };
+
+ return devm_pm_opp_set_config(dev, &config);
+}
+
#endif /* __LINUX_OPP_H__ */
--
2.31.1.272.g89b43f80a514
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